Telephone and telegraph system.



H. O. RUGH.

TELEPHONE AND TELEGRAPH SYSTEM. APPLICATION FILED JUNE 26, 1908.

9 1 120 7 Patented Jan.10,1911.

- UNITED STATES PATENT OFFICE.

HARRY 0. ItUGH, OF SANDWICH, ILLINOIS, ASSIGNOR TO SANDWICH ELECTRIC COMPANY, OF SANDWICH, ILLINOIS, A CORPORATION OF ILLINOIS.

TELEPHONE AND TELEGRAPH SYSTEM.

To all whom it may concern:

Be it known that I, HARRY O. RUGH, a citizen 'of the United States, residing at Sandwich, in the county of Dekalb and State of Illinois, have invented a certain newand useful Improvement in Telephone and Telegraph" Systems, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying IOg EIPZIWiIIgS, forming a part of this'specifica- My invention relates to telegraph and telephonesystems, and has for its object the provision of a system permitting simultaneous' telegraphy and telephony over a given circuit, together with other advantages which will be apparent from the arran ement and construction which I will now escrlbe, in connection with the accompanyingdrawing illustrating one embodiment there of, in .which A Figure 1 isa dia rammatic view of my improved system, an Fig. 2 is a detail view of the selector mechanism employed.

I have shown four stations, A, B, C and D, united by two line conductors, 1 and 2. 7 Line conductor-'1 is shown as having at each end I thereof-a telegraph relay 3, with its asso ciated key 4, and a short circuiting switch 5.

Batteries 6 are included, as is well understood. I have not shown any intermediate stations on line wire 1, although the arrange-' mentas shown does not. prohibit their inclusion. In association with line wire 2 I have also shown telegraph relays 7, withtheir associate keys 8 and short circuiting switch 9. In order to efl ectively establish telephone v conimunicatiomit is necessary to call various stations B, C and others along the line that may be added, from the station A To this end I have shown generators 10 and 11,having one terminal grounded, which by means of the keys l2 and 13 are adapted to send positive. or negative im-pulses respectively over 'line wire 2 and the ground. These positive im-V pulses actuate a selecting mechanism 14, pro vided at these stations, which is of the stepby-step variety, and is shown in othera pli I cations of mine now pending, and may. .of

any suitable form. The selecting mechanism 14: which will be described more indetail hereinafter operates a signal when properly selecting at the predetermined station. The

pegative impulses over the line wirc2 serve Specification of Letters Patent.

Patented J an, 10, 1911. 1908. Serial No. 440,571,

cation over line wire 1 and the ground can be held from either stationwith the main calling station A-" At each station Aand D I provide an arrangement of coils comprising the impedance coils 16, 16 and the noninductive I resistances 17-17, which are included. .in the circuit as shown in what might be called a Wheatstone bridge arrangement. At stations'B and C I rovide two sets of these WheatstOne' bridge arrangements between which the selectors 14 ,are connected serially with the linewire 2,

From the two opposing terminals of these Wheatsone bridge arrangements, I provide a jack 18 and the inner terminal of each \Vheatstone bridge arrangement is con nected, as shown, by means of'condensers 19 to ground. Tele hone substation sets connected with the pug 16 are provided at each .station, and'which can be used in either jack 18 or jack 15, as'desired. Suitable call bells 20 are" provided in association with each jack-18. The reasons for this arrangement and its method of opera tion will now be apparent. Sup ose for instance station A wished to call either ofthe stations'it is necessary to operate keys 12 and 13. so as to o 'erate the desired selective mechanism 14. aving called the statlon, plug 16 at the station called aunt the station calling, is inserted in ack 1'5 and telephonic communication can behad over the other line wire 1. Now should station B wish to communicate with station C, for instance, the'plug 162 at station B is inserted in the-right-hand ja'bk 18,-and'by means of the generator 21. suitable call signals are transmitted-over"line-wire 2 toound to the call bell 20 of the left-hand 1ack18 of station (1. The telephone circuit can then be traced as follows; from the ground 25, through theconden'ser 19,.through the right- .hand non-inductive resistance 17 at stat on B; to the spring 22 of the spring-jack-18, through the telephone set, through spring 25. through the second non inductive resistance 17, over the line wire 2, toward station C, through the non-inductive resistance 17 of the left-hand Wheatstone-bridge aprangement of station C, through spring 24:, through telephone set, back overt-he spring 25 through the second non-inductive resistance 17 to ground '26, through. the condenser 19. These telephonic currents between stations Band C are not transmitted over the line' Wire 2 either'to the left: of station B or to the right of station C, because the inductive resistances 16, substantially prevent such telephone transmission. The selector. mechanism 14 is shown more in detail in Fig. 2, and comprises a polarized 'electro-magnet 27, which closes contact through the magnet 28, when energized by positive impulses to rotate thcstep up mechanism 29 to call the desired station by operating its associated local signal 30. A negative impulse causes a reverse operation of relay 27, thereby to operate the magnet 31 to release the step up mechanism-"29. Itwill thus be seen that stations A and B can communicate in a similar manner over line wire 2. Stations C and D can similarly communicate over line wire 2, and these three conversations arranged tandem-like along line wire 2 are non-interfering by reason of the VVheatstone bridge arrange,- ments, as specified. Simultaneously with these telephonic circuits, telegraphic signals, by virtue of the keys 8 and relays 7 can be carried on over the line wire 2, as the telecan carry on independent conversation, the

various stations being arranged in tandem along said line wire 2, which various telephone conversations over line wire 2,""d o not conflict, and at the same time telegraphic service can be maintained over both wires 1 and 2.

. While I have herein shown and particularly described my invention, I do not wish to limitmyself to the precise construction and arrangement as herein set forth.

Having thus described my invention, what I claim as newand desire) to secure by Letters Patent is: 1 L Y N A telegraph and telephone system, comprls ng two line wires and a plurality of stat ons, means at one station for'selectively calling over the first line wire any one of the other stations, telephone instruments for communicatingover the second line .wire between the calling station and any station selectively called, telegraphic instruments connected for operation over the second line wire aforesaid, telephone instruments for communicating over the first aforesaid llne wire, telegraph instruments connected for' operation over the first-aforesaid line wire, and means associated with said first aforesaid line wire to prevent interference between simultaneously operating telephone and telegraph instruments.

2. A combined telephone and telegraph system comprising a line circuit and a return circuit, three or more sets of telegraph receiving and transmitting devices associated with said line circuit, a pair of telephone instruments associated with said' line circuit intermediate of each pair of adjacent telegraph devices, reactive means interposed in said line circuit at each station .to substantially confine the telephone currents to the telephone instruments of each pair and that portion of the line circuit connectin them, said reactive means conslstlng of a plurality of impedance coils, the arrange ment of the'reactive means. being such as to permit through telegraphic service over the entire line circuit without injuriously interfering with the operation of the various telephone circuits, selective signal receiving devices. inter osed at intervals in said line circuit, switc iug means incombination with current supplying means for selectively. o

eratingsmd devices, a, second line circuit.

paralleling the first aforesaid hne circuit,

-telegra-ph instruments associated therewith,

and switching devices for connecting the telephone instruments aforesaid between said second line circuit and the return circuit.

3. A telegraph and telephone system, com prising two line wires and a plurality of stations,means at one'station forselectively calling over a line wire any of the other stations, telephone instruments for commu-- nicating over the other line wire between the calling station and anysstation selectively called, telegraphic instrumentalities c0nnected for operation over the'line wires aforesaid independently of the station signaling means aforesaid,' switching means for connecting the telephonewinstruments aforesaid to the first aforesaid line wire, andreactive means interposed in said first aforesaid line to permit of operative telephonic communication between adjoining stations but notbeyond.

- 4. A telegraph and telephone system, com

prising two line wires and a plurality of stations, means at one station for'selectively calling overthe first wire any of the other stations, telephone instruments for communicating over the second line wire between the calling station and anystation selectively called, telephone instruments for connnunicating over the first aforesaid line wire, telegraph instruments adapted for operation over said first-aforesaid line wire and reactive means interposed in said, line .wire at each station to prevent interference between simultaneously operatingtelephone andtelegraph instruments.

5. A telegraph and tele hone system, comprising two line wires an a plurality of stations, means at one station for selectively calling over; the first line wire any of the other stations, selective signal-receiving means at each station associated with the first aforesaid line wire, telephone instruments forcommunicating over the second line wire between the callin station and any station selectively called, telegraphic instru-' mentalities' connected for operation .over the second line wire aforesaid, telephone instru- 'm'ents for. communicating over the-first aforesaid line wire, telegraph instruments adapted for operation over said first aforesaid line wire, andmeans. associated with said first aforesaid line wire to prevent interference between simultaneously operating telephone and telegraph instruments.

6. telegraph and telephone system, comprising two line wires and a plurality of stations, means at one station for se ectively calling over the first line wire any of the other stations, selective signal receiving means comprising step by step. mechanism at each station associated with said first aforesaid line wire, telephone instruments for communicating over the second line wire selectively called, telegraphic instrumentalities connected for operation over the second line wire aforesaid, telephone instruments forconnmmicating over the first aforesaid line wire, telegraph instruments adapted'for operatlon over sa d first aforesaid line wire,

and means associated with said first aforesaid line wire to prevent interference between simultaneously operating telephone and telegraph instruments.

7. A telegraph and telephone system comprising'two line wires and a plurality of staline wire, telephone instruments for-. communicating over the second line wire between the calling station and any station selectively called, -'telegraphic instrumentalities connected for operation over the second line wire aforesaid, telephone instruments for communicating over the first aforesaid line wire, telegraph instruments adapted for operation over-said first aforesaid line wire and reactive means interposed .in said line wire at each station to prevent interference between, simultaneously operatingtelephone and telegraph instruments... p

In witness whereof, l-fhere'unto subscribe my name this '15thday of June A. 1)., 1908.

. V HARRY O. RUGH,

Witnesses:

E. B. CAMPBELL,

O. M. NENNICK. 

